OBD2 S50 up and running!

[S.Low]

Yea stock m52 tune. It pulls good till redline then after that random misfire. Goes away once I restart the car. Sometimes after redline it doesn't do the misfire. I just replaced the vanos solenoid with a good working one since it's a quick easy job and the p1519 & p1525 went away.

I'm running out of ideas. I'm gonna rebuild my spare working vanos, and install it once I'm quadriple checking cam and vanos timing. It's no cost to me since I already have spare seals and rattle bushing in my tool box.

Xmas no money season so that's one reason I haven't looked into getting a tune.

My only other thought again is the crank sensor which I bought off eBay. Which I now believe could be defective after reading so much about cheap non OEM sensors.

If only I had my daily driver, it got rear ended and totaled :(

[328ijunkie]

Running stock S52 flash? It wont ever pull to redline cleanly without a proper tune with the crank sensor setup.

[S.Low]

No time at the moment. Of course with a tune I can get most out of it but I figured it should be fine for now. Codes getting thrown are now p1519 & p1525 for cam and vanos timing. I'm probably going to be doing the timing again. Even though everything lined up after putting the engine together.

[328ijunkie]

Who did your tune?

[S.Low]

Question. Where did you order you super secret crank sensor from. Unfortunately when I ordered mine, I was not aware that cheap eBay sensors are no good. So I bough it off eBay. Maybe. Maybe this could be my issue. But no code. Actually no codes at all.

I did replace the cam sensor with an OEM on after all, car runs waaay better but, after hitting rev limiter random misfires occur constantly and only goes away once I restart the car. And I put the obd2 throttle body back on, was not the issue. Replaced TPS with a good working one also.

Read also that these could be symptoms of a clogged catalytic converter. Well let's say it was not the case.

[S.Low]

Am about to order one from pelicanparts. I know a lot of people say that after market sensors are no to be trusted and to get OEM for best results and less headaches. But also some good feedback on the SIEMENS unit also.

SIEMENS is $40 cheaper than the OEM unit. Any of you guys had bad experiences with the SIEMENS unit?

[328ijunkie]

I feel like such a nuisance lol. Now I'm getting codes thrown at my face. Had code for bank1 & bank2 O2 sensors obviously from when I had hem flipped. Misfire cyl4. Cleared them been driving around and scanned it again. P0340 cam sensor and P0121 TPS comes up now. Slight hesitation while cruising partial throttle. Very prominent at freeway cruising.

I'm using the obd1 dinnan throttle body from my old 325i which was working well. I cannot imagine that going out unless someone dropped it when it was sitting at my place.

As far as the cam sensor. It came off the engine originally in the car which everything was fine till the rod knock.

Any thought on this. No misfire code yet

Cam sensor needs to be replaced and you have to have a tune for the throttle body.

[S.Low]

I feel like such a nuisance lol. Now I'm getting codes thrown at my face. Had code for bank1 & bank2 O2 sensors obviously from when I had hem flipped. Misfire cyl4. Cleared them been driving around and scanned it again. P0340 cam sensor and P0121 TPS comes up now. Slight hesitation while cruising partial throttle. Very prominent at freeway cruising.

I'm using the obd1 dinnan throttle body from my old 325i which was working well. I cannot imagine that going out unless someone dropped it when it was sitting at my place.

As far as the cam sensor. It came off the engine originally in the car which everything was fine till the rod knock.

Any thought on this. No misfire code yet

[S.Low]

Yeah I'm glad that turned out well. I didn't have an obd2 scanner with me I was growing gray hairs almost.

Will be putting the front end back together and maybe some action shots

:)

[328ijunkie]

:p

[dude8383]

Was going to suggest that you had swapped em around. Had the same problem on our end too.

[S.Low]

Ok. Make sure to plug in your O2 sensor to the right plugs. Or your car bogs out after warming up.

Flipped the plugs and seems to run and drive fine. Went for a quick test drive and it went well. Didn't drive around too long as it's dark out and I don't have a front end on or any lights lol.

[S.Low]

Actually runs waaaaaay better when engine cold. Once it gets closer to operating temperature it starts to to bog out like stated above.

��

[S.Low]

Got that low oil pressure issue fixed up. But yet another issue.

Misfiring under load and sometimes just trying to open the throttle.

I'm assuming Harness and coil packs are good since they were on the car and were fine before I pulled the engine 2 months ago. I'm pulling my hairs once again. Plugs look fine also.

I am using the obd1 throttle body and no 2ndary air pump. That's all I've changed from stock.

As far as engine timing. I triple checked it and everything ligned up after rotating the assembly.

Anyone had these issues after doing this conversion? Any tips on where I should be looking at?

Any help greatly appreciated

[328ijunkie]

Hate it when that happens. Good luck getting it sorted!